New nano fabrics have been successfully developed. Where will traditional fabrics go?
A team from Stanford University in the United States reported in the “Science” magazine on the 1st that they have developed a low-cost new fabric that can completely reflect the sun while allowing the body to The amount of heat radiated escapes, so the clothing will make people feel super “cool” when worn on the body.
Most of the heat of the human body is radiated outward in the form of infrared rays. The working principle of infrared night vision devices is to detect the infrared rays radiated by the human body at night. The Stanford researcher responsible for this research Cui Yi, associate professor of the University’s Department of Materials Science and Engineering, said that the conditions that a super “cool” fabric needs to meet are that it allows the human body to scatter infrared rays outwards unimpeded and is completely opaque to visible light, so that it can be worn on the body.
According to reports, the new fabric uses nanoporous polyethylene as its raw material. This type of polyethylene material is often used in the production of lithium batteries, and its nanopores can scatter visible light with a wavelength of 0.4 microns to 0.7 microns. It allows human body infrared rays with wavelengths from 7 microns to 14 microns to pass through almost unobstructed. At the same time, the nanopores have good air and water permeability after surface modification.
Comparative experiments show that the new fabric only increases skin temperature by 0.8 degrees Celsius, while cotton fabrics increase skin temperature by 3.5 degrees Celsius, and commercially available polyethylene fabrics increase by 2.9 degrees Celsius. In other words, compared with cotton cloth and commercially available polyethylene fabrics, skin temperature increases by 0.8 degrees Celsius. Compared with selling polyethylene fabrics, wearing clothing made of new fabrics will make people feel much cooler, which can reduce the use of air conditioners and fans.
Cui Yi said that this kind of nanoporous polyethylene is expected to be widely used in the workwear industry, especially the casual workwear industry. They are now developing non-woven fabric-like generation technology, and in addition A second generation of fabric-type super “cool” fabric will be developed. Its mechanical strength and other properties will be basically the same as real fabric, but it will also be super “cool”.
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